ISI approved helmet. Resistant to scratches and cracks, this helmet is capable of handling great impact and provides the rider with a clear view of the road ahead. The visor protects your eyes from the harmful UV radiation of the sun and makes your ride comfortable. The chin strap comes with an easy to use lock mechanism and ensures that the helmet stays securely in place during the time of an accident. Lightweight. Small (55- 57cm), Medium(57- 59cm), Large(59- 61cm), Extra Large(61- 63cm). Shell: High Impact ABS Material Shell ; Buckle: Metallic Quick release silent buckle ; Visor: Scratch resistant & UV resistant, Visor in optical polycarbonate, Quick release visor mechanism, facilitates smooth and easy visor changes